<template>
  <div class="login-container" id="building">
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" autocomplete="on"
      label-position="left">

      <div class="title-container">
        <h3 class="title">权限管理系统</h3>
      </div>

      <el-form-item prop="username">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <el-input ref="username" v-model="loginForm.username" placeholder="请输入用户名" name="username" type="text"
          tabindex="1" autocomplete="on" @keyup.enter.native="handleLogin" />
      </el-form-item>

      <el-tooltip v-model="capsTooltip" content="Caps lock is On" placement="right" manual>
        <el-form-item prop="password">
          <span class="svg-container">
            <svg-icon icon-class="password" />
          </span>
          <el-input :key="passwordType" ref="password" v-model="loginForm.password" :type="passwordType"
            placeholder="请输入密码" name="password" tabindex="2" autocomplete="on" @keyup.native="checkCapslock"
            @blur="capsTooltip = false" @keyup.enter.native="handleLogin" />
          <span class="show-pwd" @click="showPwd">
            <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
          </span>
        </el-form-item>
      </el-tooltip>

      <el-button class="edit" :loading="loading" type="primary" style="width:100%;margin-bottom:30px;"
        @click.native.prevent="handleLogin">登录</el-button>

    </el-form>

    <el-dialog title="Or connect with" :visible.sync="showDialog">
      <social-sign />
    </el-dialog>
    <div class="copyright">
      <p align="center">本权限管理系统是基于 <a href="https://github.com/">VUE-ELEMENT-ADMIN-MASTER</a> 模板使用 SpringBoot
        SpringSecurity Vue 进行开发</p>
      <p align="center">仅为<a href="https://gitee.com/eyy1234"> ©ECUST 10180824 </a>软件体系结构的课程作业展示网站</p>
    </div>
  </div>
</template>

<script>
  import SocialSign from './components/SocialSignin'

  export default {
    name: 'Login',
    components: {
      SocialSign
    },
    data() {
      return {
        // 表单登录对象
        loginForm: {
          username: 'admin',
          password: '123456'
        },
        loginRules: {
          username: [{
            required: true,
            trigger: 'blur',
            message: '请输入用户名'
          }],
          password: [{
            required: true,
            trigger: 'blur',
            message: '请输入密码'
          }]
        },
        passwordType: 'password',
        capsTooltip: false,
        loading: false,
        showDialog: false,
        redirect: undefined,
        otherQuery: {}
      }
    },
    watch: {
      $route: {
        handler: function (route) {
          const query = route.query
          if (query) {
            this.redirect = query.redirect
            this.otherQuery = this.getOtherQuery(query)
          }
        },
        immediate: true
      }
    },
    created() {
      // window.addEventListener('storage', this.afterQRScan)
    },
    mounted() {
      // 如果用户名为空则焦点聚焦到用户框
      if (this.loginForm.username === '') {
        this.$refs.username.focus()
      } else if (this.loginForm.password === '') {
        this.$refs.password.focus()
      }
    },
    destroyed() {
      // window.removeEventListener('storage', this.afterQRScan)
    },
    methods: {
      checkCapslock(e) {
        const {
          key
        } = e
        this.capsTooltip = key && key.length === 1 && (key >= 'A' && key <= 'Z')
      },
      // 显示密码
      showPwd() {
        if (this.passwordType === 'password') {
          this.passwordType = ''
        } else {
          this.passwordType = 'password'
        }
        this.$nextTick(() => {
          this.$refs.password.focus()
        })
      },
      /**
       * 处理登录请求
       */
      handleLogin() {
        // 表单验证
        this.$refs.loginForm.validate(valid => {
          if (valid) {
            console.log("验证后");
            this.loading = true // 加载动画
            this.$store.dispatch('user/login', this.loginForm) // vuex中user/login的login方法
              .then(() => {
                console.log("验证通过");
                this.$router.push({
                  path: this.redirect || '/',
                  query: this.otherQuery
                })
                this.loading = false
              })
              .catch(() => {
                this.loading = false
              })
          } else {
            console.log('error submit!!')
            return false
          }
        })
      },
      getOtherQuery(query) {
        return Object.keys(query).reduce((acc, cur) => {
          if (cur !== 'redirect') {
            acc[cur] = query[cur]
          }
          return acc
        }, {})
      }
    }
  }

</script>

<style lang="scss">
  /* 修复input 背景不协调 和光标变色 */
  /* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

  $bg:#283443;
  $light_gray:#fff;
  $cursor: #fff;

  @supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
    .login-container .el-input input {
      color: $cursor;
    }
  }

  /* reset element-ui css */
  .login-container {
    .el-input {
      display: inline-block;
      height: 47px;
      width: 85%;

      input {
        background: transparent;
        border: 0px;
        -webkit-appearance: none;
        border-radius: 0px;
        padding: 12px 5px 12px 15px;
        color: $light_gray;
        height: 47px;
        caret-color: $cursor;

        &:-webkit-autofill {
          box-shadow: 0 0 0px 1000px $bg inset !important;
          -webkit-text-fill-color: $cursor !important;
        }
      }
    }

    .el-form-item {
      border: 1px solid rgba(255, 255, 255, 0.1);
      background: rgba(0, 0, 0, 0.35);
      border-radius: 5px;
      color: #454545;
    }
  }

  #building {
    background: url("./background.jpg");
    width: 100%; //大小设置为100%
    height: 100%; //大小设置为100%
    position: fixed;
    background-size: 100% 100%;
  }

</style>

<style lang="scss" scoped>
  $bg:#2d3a4b;
  $dark_gray:#889aa4;
  $light_gray:#eee;

  .login-container {
    min-height: 100%;
    width: 100%;
    background-color: $bg;
    overflow: hidden;

    .login-form {
      position: relative;
      width: 520px;
      max-width: 100%;
      padding: 160px 35px 0;
      margin: 0 auto;
      overflow: hidden;
    }

    .tips {
      font-size: 14px;
      color: #fff;
      margin-bottom: 10px;

      span {
        &:first-of-type {
          margin-right: 16px;
        }
      }
    }

    .copyright {
      font-size: 10px;
      color: #fff;
      // padding-top: 50px;
      margin-top: 200px;
    }

    .svg-container {
      padding: 6px 5px 6px 15px;
      color: $dark_gray;
      vertical-align: middle;
      width: 30px;
      display: inline-block;
    }

    .title-container {
      position: relative;

      .title {
        font-size: 26px;
        color: $light_gray;
        margin: 0px auto 40px auto;
        text-align: center;
        font-weight: bold;
      }
    }

    .show-pwd {
      position: absolute;
      right: 10px;
      top: 7px;
      font-size: 16px;
      color: $dark_gray;
      cursor: pointer;
      user-select: none;
    }

    .thirdparty-button {
      color: #fff;
      background-color: rgb(21, 47, 72);
      border-color: rgb(21, 47, 72);
      position: absolute;
      right: 0;
      bottom: 6px;
    }

    .thirdparty-button:hover,
    .thirdparty-button:focus {
      background: var(--el-button-hover-color);
      border-color: var(--el-button-hover-color);
      color: var(--el-button-font-color);
    }

    @media only screen and (max-width: 470px) {
      .thirdparty-button {
        display: none;
      }
    }
  }

  .edit {
    color: #fff;
    height: 47px;
    background-color: rgb(21, 47, 72);
    border-color: rgb(21, 47, 72);
  }

  .edit:hover,
  .edit:focus {
    background: var(--el-button-hover-color);
    border-color: var(--el-button-hover-color);
    color: var(--el-button-font-color);
  }

</style>
